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Pipet device with disposable tip

Inactive Publication Date: 2005-04-05
ARKRAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is conceived under the circumstances described above. Therefore, an object of the present invention is to provide a pipet device in which the pipet nozzle is not contaminated with the remaining sample in pulling out the pipet tip from the pipet nozzle.

Problems solved by technology

However, the above-described prior art method is not sufficient to prevent different kinds of samples from mixing and has the following problems.
However, if the former measure is taken, the volume of the tip 9 increases, which makes it difficult to suck the sample m precisely by a desired amount.
Further, such an increase in length of the tip 9 leads to an increase in overall size of the pipet device.
On the other hand, if the latter measure is taken, the replacement of the tip 9 requires much time, which deteriorates the work efficiency.

Method used

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  • Pipet device with disposable tip
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  • Pipet device with disposable tip

Examples

Experimental program
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Embodiment Construction

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1-3 illustrate a pipet device (generally indicated by a reference sign A) according to a first embodiment of the present invention. As clearly shown in FIG. 1, the pipet device A includes a pipet nozzle 1, a syringe pump 2 and a joint tube 3. These structural parts are formed of a corrosion-resistant material such as stainless steel. The pipet device A further includes a pipet tip 4. The tip 4 s removably attached to the nozzle 1.

As shown in FIGS. 1 and 2, the pipet nozzle 1 is generally cylindrical and internally formed with a passage 10 extending along an axis C. The nozzle 1 is upwardly provided with a threaded portion 11 and a flange portion 12 for connection with the joint tube 3. The nozzle 1 is provided, at a longitudinally intermediate portion thereof, with a ring groove 13 for attaching an O-ring 14. The reference numeral 15 indicates the portio...

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PUM

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Abstract

A pipet device (A) includes a pipet nozzle (1) formed with an internal passage (10) and a hollow pipet tip (4) removably attached to the nozzle (1). The tip (4) is movable between a normal fixed position and a completely detached position relative to the nozzle (1). The nozzle (1) is formed with an external-air intake groove (16). The intake groove (16) is closed by the tip (4) when the tip (4) is at the normal fixed position. The intake groove (16) is exposed from the tip (4) when the tip (4) is moved from the normal fixed position toward the completely detached position.

Description

TECHNICAL FIELDThe present invention relates to a pipet device used for measuring or transferring a liquid sample such as blood or urine.BACKGROUND ARTConventionally, a pipet device is often used in examining a liquid sample (such as blood or urine). A typical pipet device includes an elongate tube for sucking and retaining a liquid sample. Using such a pipet device, a taken sample is transferred from one container to another container or to an analyzer. (Hereinafter, this work is referred to as “pipetting”.)In handling plural kinds of samples, different kinds of samples should not be mixed by pipetting. Conventionally, therefore, as shown in FIG. 5A, a disposable tip 9 is fitted outwardly to the end of a pipet nozzle 8 so that a sucked sample m does not come into contact with the pipet nozzle 8. When discharging of the sample m is finished, the tip 9 is replaced with a new tip.However, the above-described prior art method is not sufficient to prevent different kinds of samples from...

Claims

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Application Information

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IPC IPC(8): B01L3/02G01N1/00G01N35/10
CPCB01L3/0279G01N2035/103B01L2200/0684
Inventor MATSUDA, TAKESHIKITAMURA, SHIGERU
Owner ARKRAY INC